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Runoff water from melting snow makes a waterfall from an overpass along I-55 in Jackson, Miss., Thursday, Jan. 17, 2013. A winter storm system left 2 to 4 inches of snow in parts of central Mississippi before heading east toward Alabama, the National Weather Service said. (AP Photo/Rogelio V. Solis)

Runoff water from melting snow makes a waterfall from an overpass along I-55 in Jackson, Miss., Thursday, Jan. 17, 2013. A winter storm system left 2 to 4 inches of snow in parts of central Mississippi before heading east toward Alabama, the National Weather Service said. (AP Photo/Rogelio V. Solis)